A load cell is actually a device that converts a quality signal into a measurable electrical signal output. The sensor should first consider the actual working environment of the sensor. This is very important for the correct selection of the load cell. It is related to the normal operation of the sensor, its safety and service life, and the reliability and safety of the entire scale. Sex. In the basic concepts and evaluation methods of the main technical indicators of the load cell, there are qualitative differences between the old and new national standards. There are several types of S-type, cantilever type, spoke type, plate ring type, bellows type, bridge type, and column type.
The electronic scale adopting the tension and pressure sensor, the sensor has higher accuracy, cheaper price and less damage than the ordinary pressure sensor, so the application prospect is wide. The electronic scale can be used for batching and measuring force in factory production, and has the advantages of accurate measurement, high resolution, not easy to damage and low price.
The electronic scale circuit is shown in the figure. The main integrated city MC14433 is an A/D conversion integrated block, 4511 is the LED display driver integrated block 1413 for the bit selection film, 1403 provides the main integrated circuit a stable comparison voltage, 7650 is the chopper stable zero monolithic integrated operational amplifier, the amplified sensor output Voltage signal. The sensor uses a BLR type tension and pressure sensor. In the figure, RA, RB, RC, and RD are the strain resistances in the sensor. The voltage regulator circuit 7805 provides 5V voltage to the entire circuit, and the input voltage of the 7805 operates normally at 8-15V. It can also be supplied to the instrument after being decompressed, rectified and filtered by AC 220 V.
Because the instrument is used in high precision applications, the resistance components of the 14433, 1403, and 7650 peripherals should be selected with low temperature coefficient and good thermal stability. The resistor should be RJ metal film resistor. The difference between the resistance of the 7650 and the resistance of the two resistors of RE and RF should be less than 1%. Otherwise, it may be adjusted to zero when the scale is adjusted. RE and RF resistance values ​​range from tens of k to several hundred k, depending on the size of the sensor selected. The sensor range is small, such as 200kg, the resistance value is selected to be smaller, the range is large, such as 2000kg, the resistance value is selected to be larger. If the decimal point is used, the decimal point resistance is connected to V+. When the sensor is less than 200kg, the first decimal point is connected to the right side. When the sensor range is between 200ks and 2000kg, the decimal point is not bright, and the minimum resolution is 1kg.
Wire On Tube Condenser air cooled condenser
The condenser which is cooled down of the natural air. this Condenser category as a natural convection type of air cooled condenser which cooled, by the help of natural air.
In construction, it consists of a copper tube Or coil and maybe iron or steel coil upon which iron or steel material of fitted Or soldered together. the flows through the compressed vapour refrigerant in the coil then coil are heated up and supplies it to iron meterial. This iron meterial rejection of the heat, to the atmospheric air.
This type of condenser used in Domestically. For example of the Refrigerators, it's located at the background of the Refrigerators.
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